supremacy

Etymology

From supreme + -acy (a variant of -cy). Compare with supremity and New Latin suprematia.

noun

1. The quality of being supreme.
2. Power over all others.
3. (in combination) The ideology that a specified group is superior to others or should have supreme power over them.
   white supremacy
   Fighting a war against Hitler's Nazi ideology, with its doctrine of Aryan supremacy and its "final solution" to protect against an "inferior people," accentuated the final irony of an America fighting a racist ideology while trying to keep its own racist ideology intact. 2004, Andrew Michael Manis, Macon Black and White: An Unutterable Separation in the American Century, Mercer University Press, page 139
4. (in combination) A state of privilege for a specified group relative to other people in society.